Punching apparatus for radiators



May 29, 1928. 1,671,619

J. w. vANcE PUNCHING APPARATUS FOR RADIATORS Filed July 9, 1925 ssheets-sheet 2 Clawwup.

May 29, 1928. *n 1,671,619

J. w. vANcE PUNCHING APPARATUS FOR RADIATORS Filed July 9, 1925 3Sheets-Sheet 3 K I @@W' Patentedv May 29, 19,28.

UNITED STATES .oHN w. vANcE, on DETROIT, Ironman.

PUNiCHIN G APPARATUS FOB BADIATOBS.

Application filed July 9,

This invention relates to a punching apparatus for radiators, and hasspecial reference to the punching of radiator shells to provide a`multiplicity of openings aboutthe shell `with the openings arranged sothat a hood or any suitable structureor device maybe attached thereto.In the production of a large uantity of radiator shells for any particuar automobile all ol the openings punched in the shell must be properlyspaced and uniform in size. It isthe present practice to `punch theseshell openings one at a time or in small groups with result thatconsiderable time and labor are required and i very often an openinormisplaced `which results inwaste and delaay.

My invention aims to provide an apparatus that may be used in varioustypes of resses or other machines having a presser iiead or plunger forstriking a blow. ,Such i a head or plunger is utilized in connection`with my apparatus for simultaneously operating a plurality of punchinginstrumentalities Whlch are arranged'about'a shell die so that aradiator shell ma have all of its openings punched at a singleoperation.

y invention further aims to provide novel punching instrumentalitiesthat may be arranged for simultaneous operation on 3,0 a piece of work,land each `instrumentality includes a punch; wedge means for actuatingthe` punch; `means for1 lubricating the punch, and a strip er device.`rllhe construction of` the punc ling instrumentalities is such that theymay be easily grouped about the piece of work and positively lixed toinsure accuracy. Many advantages are gained from the economical andexpeditiousmanner in which the radiator shells are punched. 4o Some ofthese advantages will hereinafter appear when describing myA inventionin detail by aid of the accompanying drawings, wherein y v y Figure '1is a plan of a portion of the apparatus with a portion of a radiatorshell 1n Iposition to be punched; ig. 2 is a side elevation of the same;

Fig. 3 is a plan of a portion oli' the bed plate showing a stationaryshell diethereon; `F ig. 4 is a side elevation of a unchinginstrumentality `with a portion o the vbed plate in section; p

Fig. 5 isalongitudinal sectional view of a portion of the punchinginstrumentality showing the punch as having been actuated; housings onthe bedplate 1.

laas.` semi No. 42,359.

Fig. 6 is aplan of the punching instrumentality shown in Fig. 4' andFig. 7 is a vertical sectional view of another form of punchingapparatus.

To put my invention into practice, I provide a light and durable bedplate 1 and in this bed plate are a series of outer openings 2 and aseries of inner openings 3. The outer openings 2 are adapted `foranchoring individual punching instrumentalities and the inner openingsare used for anchoring a stationary die, consequently these open-` ingsare accurately positioned inthe bed plate so that no mistake may occurin locat` ing the partsadapted to position a radiator shell While otherparts operate upon the shell. y

The inner series ol? openings 3 are adapted to receive screw bolts 4 andthese screw bolts anchor the lateral llanges 5 of die holders 6 on thebed plate 1. The die holders 6 have shoulders 7`- and seated on saidshoulders are dies 8 retained thereon by screws 9 or other fasteningmeans. The `dies 8 have punch openings A10 alining with slug openings 11in the shoulders 6.

As shown in Fig. 3 some of the holders 6 may be straight andotherscurved and the configuration of the entire die depends on thepiecerof `Work to be punched. In this instance it is a radiator shell 12having an inset liange 13 which must be provided with a plurality ofspaced openings 14. The top and bottom flanges 13 are to be punched andthe die of the bed plate is arranged sothat the radiator shell 12 may beplaced down on the die with the inset flange 13 about the dies 8 so thatthese `dies will back up the flange 13 during punching operations.

The outer series of-openings 2 of the bed 95 plate lare adapted toreceive screwI bolts 15 which enter the base pieces 16 of punch housings17, said base pieces fitting under under-cut ortions 18 of the dieholders 6, so that said die holders may woperate with the screw boltsV15 in preventing vertical displacement of the punch housings. To preventlateral displacement there are side tie rods 19 screwed into the dieholders 6 and supporting clamping `bars 20 against the outer ends of thehousingibase pieces 16. Nuts 2l on the ends of the tie rods 19 ermit ofthe bars2() being clamped against the punch housings to hrmly anchorsaid The punching instrumentalities are identical in construction,atherefore I deem it only necessary to specifically describe one ofthese devices.

Each punch housing 17 has n vertically disposed bore 22 andcommunicating with the lower end of said bore is a lateral bore 23.Slidable in the lateral bore is a liori zontal wedge 24 having its'inner end beveled, as at 25 'for engigement with the lower beveled end26 of a vertical wedge 27.` 'The wedges 24 and 27 are 'preferablycylindrical and the walls of said wedges and bores are adapted toreceive lubricant `from suitable cups 28 carried by the housing 17 `andcoininunicating with the bores 22 and 23 by ports 29 vin said housing.

lThe vertical wedge 27 is provided with al longitudinal groove fl() intowhich extends the iniier end of a stop screw l3l, said screw cooperatingwith ends of ,the groove iii 'limiting the rsliding movement of thevertical Wedge 27 Ain the bore '22. ,'Tlie vertical Wedge has its upperend projecting above the housing 17 and ,provided with a screw 32adapted to be adjusted and set relative .to the upper end of thevertical wedge by a lock nut Onthe outer end 4of the iliorizontal wedge24 (is ahead 34 =provided with a transverse dove-tailed groove 35 `foradove-tail `punch holder 36 which fmust-be lplaced endwise in the head34. Screws `or other fastening means `may 'be employed lfor anchoringthe punch holder.

In .the `,punch holder are openings 38 for punches 39, said Apuncheshaving heads 4() seated in the punch holder 36 and `outer reduced Vends4l that actually .do .thepunching A vWhat maybe considered vtheouterei'id of the punch housing `17 has a stationary support 442 for aretractile device 43, preferably in the forni of a heavy rubber `sleeveabout the support 42. The iouterendlol' the rubber sleeve 43 isengagedby a Aplate 44having side ears 45 ltor connecting rods 46, said rodsextendinginwardly at the sides of the'liousing 1T with `the innerendsthereof kmounted in `the head 34 so thatthis head will Abe held normallyagainstthe innerfend ofthe housing 17.

W'henthe vertical .wedge Y27 `is struck a blow toiactuatethe `horiaontalwedge 24 the rubber sleeve 43 is placed under compression .or stressed.to the extent `o' providing a force lwhich will retract the head 34 andthe wedges and 27 after each Apunching operation. The retractile device43 also serves as a. cushioning element and in this connection may beconsidered the mechanical equivalent .of .aretractile spring.

Betweenthe `punch .holder 36 and the die 8 ris a .stripper bar 47 havingitsendsprovided with dowel pins 48 sldable through the punch holder 36and in the head 34.

The stripper bar 47 has openings 49 corresanding in number to thepunches 39. 'l is stripper bar is reciproca'ble relative to the reducedpunching end 41 of the punchers 39 amd smid .stripper bar is adapted topress the shell flange 14 against the die 8 during the punchingoperation, so that the flange cannot be distorted by the punches 39 saidpunches drive the slugs into the openin s 10 of the dies and theopenings 11 of the ho' ders (i. Y

With. the punching instifunientalities grou d about the vlarge shelldie, as shown in Fig. 1, a'll of the wedges27 are vertically disposedwith the screws 32 thereof in substantially the saine"`horizonta;lplane, conseiuently a large presser head or plunger 5t), orming art ofan ordinar press o r panelliiiie may be ein 'eyed for sixnifl taneouslyoperatin all `o' 'the ,punchin .in-p strumentalities to simultaneouslyprovi' e the flange open-ings '14. It is onl necessary for' a workmanlto place the -ra ator .shells 12 in position, cause the presser head orpunch 50 to strike a blow, and then remove 'the punch shell and placeanother in position.

In Fig. 7 I show another 'form of appa.- ratus wherein the expansiveforce of a spring 51 holds the vertical wed e ,27 against'the plunger50. The inner en' s of .theedges 27 and 24 are squared 0E and abody of'oil or other liquid '52 is placed in the bore22, between the` wedges.The bore -22 haslan annularchamber 53 supplied with .oil or liquid fromareservoir 54 andwlienthe vertical wedge 27 is depressed a quantity of.oil is trapped in the bore and constitutes a medium of coin ressionagainst thehorizon'- ing mac tal wedge 24. f course, the oil serves asalubricant andthe reservoir, supply 'takes care of any oil leakage.

'It is thought that the operation and utility of my punc ing aparatus-willibela parent without further *escriptiom -and .w ile'in thedrawings, there is illustrated a lpreferred embodiment of my invention,it `1S to be understood that the structural elementi are susceptible tosuch variations and lmodi- Iicationsas fall within the scope'oftheagpended claims. A

What `I .claim isz- 1. A punching instrumentality comprising a housing,punches, Wedgesadapted .toactuate said punches, retmctile ,means v.atone end of said housingfor said l.punches,.and stripper bar at theopposite end oflsaidlhnsing.

2. A unching .instrumentality 4vcalld for in. im Al, whereinsaidwedgesaredisposed in housing bores `one ata right angle to theother.

3. A punching instpumentality as called for in ,claim l, and a `blowreceivingscrew carried byoneiof said wedges 4. A punchinginstrumentality as called msy for in claim 1, wherein said retractilemeans 6. A punchin instrumentality as called includes a support, arubber sleeve on said for in claim 5, Werein said retractile meanssupport, and a plate bearing against and conincludes a rubber sleeve,and a plate bearing nected to one of said wedges. against said rubbersleeve and connected to 15 5 5. A punching instrumentality comprisingsaid horizontal wedge.

a housing, a vertical Wedge in said housing 7. A unching instrumentalityas called adapted to Mbe struck a blow, a horizontal for in c aim 5, anda stripper bar slidably wedge in said housing actuated by saidVversupported relative to said punches.

tical wedge, a punch holder supported from In testimony whereof I alixmy signature. 10 said horizontal Wedge, punches in said n holder andretractile means for said punches. JOHN W. VANCE.

